get ITEM [NUM] from CONTAINER [NUM]
This will get a single ITEM from a CONTAINER. You can also get ITEM 2 from CONTAINER 2

get all from CONTAINER
This will move everything from the specified CONTAINER into your inventory.

put ITEM [NUM] in CONTAINER [NUM]
This will put a single ITEM into a CONTAINER. You can also put ITEM 2 in CONTAINER 2

Note that you cannot put a full container inside of another container.

You might wish to alterobj your containers to give them a specific title, which is helpful for organizational purposes.